INTERACTIVE SCHEMATIC

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Cover PageInformation

SchematicMachine Views

Component TableTap Table

Fluid Power Symbols

Electrical Symbols

Front Frame

Rear Frame

Tap Views

Features

Options

Bookmarks X

EC-C3EC-C2 E-C60

EC-C1

E-C61

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©2010 Caterpillar, All Rights Reserved Printed in U.S.A.

KENR7744November 2010

390D Excavator Hydraulic System - AttachmentWAG1-UPBYP1-UPWAP1-UPWBT1-UPKCZ1-UP

One-Way Flow

COMPONENT LOCATION

Description PartNumber

MachineLocation

SchematicLocation

335-0538335-0547212-5467210-8157

Note ANote ANote A

242-6878234-4531185-03366E-55346E-5534310-0122247-8978225-4614295-9447295-9446209-5895209-5895170-9918295-9678334-9990155-9222221-8859221-8859260-2180260-2180295-9595227-0678173-3429201-9382201-9381 241-8929295-7745140-0736352-6819116-3420155-9200155-9200

Attachment - One-Way FlowValve GP - Relief 165-9614

Note A: Check Parts Manual For Proper Cylinder Part Number

Accumulator GP - Charged (Return Line)Accumulator GP - Hydraulic (Charged)Breather GPCooler GP - Hydraulic OilCylinder GP - BoomCylinder GP - BucketCylinder GP - StickFilter GP - Oil (Hydraulic)(Return) 1Filter GP - Oil (Hydraulic)(Return) 2Filter GP - Oil (Hydraulic)Filter GP - Oil (Hydraulic)(Case Drain, Motors)Filter GP - Oil (Hydraulic)(Case Drain, Pumps)Manifold and Valve GP - Load SensingMotor GP - FanMotor GP - Hydraulic FanMotor GP - Swing (Front)Motor GP - Swing (Rear)Motor GP - Travel (Left)Motor GP - Travel (Right)Pump GP - Fan MotorPump GP - Hydraulic (Swing)Pump GP - Hydraulic (Main)Pump GP - PilotSensor AS - Pressure (Load Sensing)Sensor AS - Pressure (Overload Warning)Sensor AS - Pressure (Main Pump)Sensor AS - Pressure (Swing Pump)Swivel GPTank AS - Hydraulic OilValve GP - Check 1Valve GP - Check 2Valve GP - Check 3Valve GP - Control (Swing)Valve GP - Control (Main)Valve GP - Manifold and ReducingValve GP - Solenoid (High Pressure Cutoff)Valve GP - Swing CushionValve GP - Travel Counterbalance (Left)Valve GP - Travel Counterbalance (Right)

1 C-12 D-43 A-84 B-75 F-76 F-87 F-88 A-89 A-810 B-811 A-712 A-713 B-514 A-615 A-716 F-417 F-318 F-619 F-520 A-521 A-422 A-323 A-524 B-625 C-626 A-327 B-528 E-529 A-830 A-631 C-132 C-833 E-334 C-235 D-536 B-537 E-438 E-639 E-5

50 E-8

TAP LOCATION

TapNumber Description Schematic

LocationDrive Pump Output PressureIdler Pump Output PressureLoad Sense Pressure (Main Hydraulic Pump)Stroking Pressure (Swing Pump) Pilot Pump Output PressurePilot Pressure to Swing PumpPilot Accumulator PressurePower Shift Pressure (Main Hydraulic Pump)

A B-3B B-3

LS2 A-2M1 A-4P A-5P1 B-5PG D-4PS1 A-3

©2010 Caterpillar, All Rights Reserved

FLUID POWER SYMBOLS

ONE POSITION TWO POSITION THREE POSITION

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

LINES CROSSING LINES JOINING

TWO-WAY THREE-WAY FOUR-WAY

SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION(FIXED)

2-SECTION PUMP

MAIN AUX.

SPRING(ADJUSTABLE)

VARIABILITY LINE RESTRICTION(VARIABLE)

LINE RESTRICTIONVARIABLE and PRESSURE

COMPENSATED

PRESSURECOMPENSATION

PUMP: VARIABLE andPRESSURE COMPENSATED

ENERGY TRIANGLESHYDRAULIC PNEUMATIC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLSRELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDor MANUAL

SOLENOIDand PILOT

SOLENOID and PILOT or MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECK VALVES

TWOPOSITION

INFINITEPOSITIONING

FLOW IN ONEDIRECTION

FLOW ALLOWED INEITHER DIRECTION

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P TSHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLED

ELECTRICAL SYMBOLSHydraulic Symbols (Electrical)

325-AG135 PK-14

Circuit IdentificationNumber

Wire Color Wire Gauge

Harness identification codeThis example indicateswire 135 in harness "AG".

325-PK-14

Wire Gauge

Wire Color

Circuit Number Identification

Wire Number Identification Codes

Current Standard

Previous Standard

Electrical Schematic Example Hydraulic Schematic Example

325-PK

Wire ColorCircuit Number Identification

B A

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer(Fluid)

Transducer(Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch (Adjustable)

Temperature Switch

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

T

F8

E8

D8

C8

B8

A8

F7

E7

D7

C7

B7

A7

F6

E6

D6

C6

B6

A6

F5

E5

D5

C5

B5

A5

F4

E4

D4

C4

B4

A4

F3

E3

D3

C3

B3

A3

F2

E2

D2

C2

B2

A2

F1

E1

D1

C1

B1

A1

HYDRAULIC CIRCUIT COLOR DESCRIPTIONSPILOT PUMP OUTPUTDRIVE PUMP OUTPUTHIGH PRESSURE CUTOFF CIRCUITDRIVE AND IDLER PUMPS COMBINED CIRCUITFAN PUMP AND CIRCUITSUPPLY LINESTICK CYLINDER & CONTROL CIRCUITLEFT TRAVEL MOTOR & CONTROL CIRCUITATTACHMENT CONTROL CIRCUITSWING MOTOR & CONTROL CIRCUITDRAIN / RETURN LINESWING BRAKESIDLER PUMP OUTPUT BUCKET CYLINDER & CONTROL CIRCUITRIGHT TRAVEL MOTOR & CONTROL CIRCUITBOOM CYLINDER & CONTROL CIRCUIT

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

CALLOUTS

Taps (Pressure, Sampling, Sensor - by letter)YY

Components are shown installed on a fully operable machine with the key and engine off, transmission shifterin neutral and with parking brake set.Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.

390D EXCAVATOR HYDRAULIC SYSTEM

PART NUMBER: 297-0308, CHANGE: 00, VERSION: HE

MEDIA NUMBER : KENR7744ATTACHMENT : ONE WAY FLOW

12345678

A

B

C

D

E

F

12345678

A

B

C

D

E

F

TRAVEL MOTOR (RIGHT)TRAVEL MOTOR (LEFT)

Pi5

Pi4

Pi3

Pi2

Pi1

PSA4

PSA3

PSA2

PSA1

PAC

DR1

DR2

DR3

DR4

DR5

DR6P-INT-OUT

Pi6

DR6

DR5

GT2T1 RA

M2

A

S DR1 DR S M1

L2

L1

P2

D2S1D1

P1PS1 SA1 SA2a1 a2

LS1 LS2

AL3 BL3

PP3

T1

T2

BG

BA

AGBG AG

AB

T2

T1

PP3

A

DR

B

DR

A B

DR1

PS2

Pi1

P.P.I

P.P.O

SWING MOTOR (FRONT) SWING MOTOR (REAR)DB

PG

SDr2PTSDr1

MM

PG2 DBPG1

PBPA

B

BA

PA PB

A

A1 B1A1 B1

(R) (L)

(R)(L)

(FWD)(FWD) (BKWD)(BKWD)

L1G

Dr

L2

T

C1

C2

P

Dr

PF PR

BR2 AR2 BR3 AR3

AL2 BL2

AL1 BL1

PR

PF

AR1BR1

BR2 AR2 BR3 AR3

A

BLBRL BRA

B

Qmax Qmin

(BKWD)(BKWD)(IN)

(FWD)(FWD)(OUT)

STIC

K

TRAV

EL(L

)

TRAV

EL(R

)

(CLOSE) (UP)

(OPEN) (DOWN)

BOOM

BUCK

ET

ATCH

HPC-ON

aR3aR2aR1

bR3bR2bR1R2

aL1aL2aL3

bL1bL2bL3R1 HPC-OFF

(RET)

(EXT)

PS2

PS2

PS3

PS3 DR3

DR3 DR2

DR2

PS4 DR4

Pi2

Pi2

DR4

MU

PS4

AL1 BL1

BR1AR1AL2 BL2

MU

SP

PRPD

PG

PB

SINGLESINGLE

(1) ACCUMULATOR GP CHARGED(RETURN LINE)335-0538

(2) ACCUMULATOR GP HYDRAULIC (CHARGED)335-0547

(8) FILTER GPOIL (HDRAULIC)

(RETURN) 1242-6878

(9) FILTER GPOIL (HYDRAULIC)

(RETURN) 2234-4531

(10) FILTER GPOIL (HYDRAULIC)

185-0336

(11) FILTER GPOIL (HYDRAULIC) (CASE DRAIN, MOTORS)6E-5534

(13) MANIFOLD AND VALVE GPLOAD SENSING310-0122

(14) MOTOR GPFAN

247-8978

(15) MOTOR GP HYDRAULIC FAN225-4614

(16) MOTOR GP SWING (FRONT)295-9447

(17) MOTOR GP SWING (REAR)295-9446

(18) MOTOR GP TRAVEL (LEFT)

209-5895

(19) MOTOR GP TRAVEL (RIGHT)209-5895

(20) PUMP GP FAN MOTOR

170-9918

(21) PUMP GP HYDRAULIC SWING295-9678

(22) PUMP GP HYDRAULIC (MAIN)334-9990

(23) PUMP GP PILOT

155-9222

(28) SWIVEL GP295-9595

(30) VALVE GP CHECK 1173-3429

(31) VALVE GP CHECK 2201-9382

(32) VALVE GPCHECK 3201-9381

(33) VALVE GPCONTROL (SWING)241-8929

(34) VALVE GP CONTROL (MAIN)295-7745

(35) VALVE GP MANIFOLD AND REDUCING

140-0736

(36) VALVE GPSOLENOID (HIGH PRESSURE CUTOFF)352-6819

(37) VALVE GP SWING CISHION116-3420

(38) VALVE GP TRAVEL COUNTERBALANCE (LEFT)

155-9200(39) VALVE GP TRAVEL COUNTERBALANCE (RIGHT)155-9200

LS2

PS1

M1

P

P1 BA

PG

(26) SENSOR AS PRESSURE(MAIN PUMP)260-2180

(27) SENSOR AS PRESSURE

(SWING PUMP)260-2180

(25) SENSOR ASPRESSURE

(OVER LOADWARNING)221-8859

(24) SENSOR ASPRESSURE

(LOAD SENSING)221-8859

(3) BREATHER GP212-5467

(4) COOLER GP HYDRAULIC OIL210-8157

(29) TANK ASHYDRAULIC OIL

227-0678

(12) FILTER GPOIL (HYDRAULIC) (CASE DRAIN, PUMPS)6E-5534

(5) CYLINDER GPBOOM

(7) CYLINDER GPSTICK(6) CYLINDER GP

BUCKET

(50) VALVE GPRELIEF165-9614

COMPONENT LOCATIONS

3938

37

34

33

30

29

28

27

26

24

23

22

2120

19

18

1716

1514

13

12

11

10

9

8

7

6

5

4

3

PS1

P

P1

M1

LS2

BA

MAIN CONTROL COMPONENT LOCATIONS

REAR VIEW

FRONT VIEW

36

35

32

31

25

2

1

PG

ONE-WAY FLOW

50